Banning texting in cars makes no sense if the "texter" is not the "driver".

You should write to your local congressperson (or whoever makes laws in your country) and alert them to this, just in case they make such a law without taking your point into account. Also point out that they shouldn't ban you from texting in a car if it's parked. And to make sure that "cars" includes trucks, SUV's, etc. And that it's still texting if you are wearing a hat. And that the law applies to people over the age of 75 too. And make sure those little car rides you find in shopping centres are excluded from such laws. And they need to clarify the situation where you are outside the car but leaning on it while you are texting.